Convert

OPUS to M4R converter

Convert OPUS to M4R for free, right in your browser. Your files never leave your device.

    Converted on your device · never uploaded · Free limits

    Where it runs
    On your device
    Free allowance
    Unlimited
    Typical time
    Usually under 5 seconds
    Sign-up
    Not needed

    What happens to your OPUS

    iPhone ringtones are limited to 40 seconds, so longer audio is trimmed.

    WhatsApp voice notes are OPUS files. Converting them to MP3 makes them play on any phone, laptop or car stereo.

    This conversion runs inside your browser, so the file is never uploaded. Files over 400 MB are sent to our server instead, and deleted within 60 minutes.

    How to convert OPUS to M4R

    1. Choose your file Tap Choose files and pick the OPUS file, or drop it onto the page. You can add several at once.
    2. Convert to M4R The conversion starts on your device straight away. Nothing is uploaded.
    3. Download Tap Download to save the result.

    What is an OPUS file?

    The modern codec used by WhatsApp voice notes, Discord and Zoom. It sounds excellent at very low bitrates, which makes it great for speech.

    Chrome, Firefox, VLC and Android play OPUS. Many car stereos and older players do not.

    More about OPUS files

    What is an M4R file?

    An AAC audio file renamed for iPhone ringtones. Ringtones must be 40 seconds or shorter.

    iPhone (through Finder or iTunes) and GarageBand.

    More about M4R files

    Questions

    Is converting OPUS to M4R free?

    Yes, completely. This conversion runs on your device, so there is no daily limit and no sign-up. We never ask you to pay after you have converted.

    Is it safe to convert my OPUS files here?

    Yes. The conversion happens inside your browser, and the file never leaves your phone or computer.

    How long does OPUS to M4R take?

    Usually under 5 seconds. Bigger files take longer, and you can watch the progress on each file.

    Can I convert OPUS to M4R on my iPhone or Android phone?

    Yes. The converter works in Safari, Chrome and any modern browser. Tap Choose files, pick from Photos or Files, and download the result to your phone.

    How do I open an M4R file?

    iPhone (through Finder or iTunes) and GarageBand.

    Convert OPUS to other formats

    Convert other files to M4R